JP2010167354A - Automatic spindle coating method and apparatus using rotary feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance productivity in spindle coating in which a plurality of revolving objects to be coated are simultaneously coated, when normal and inverted coating are required for the purpose of keeping uniformity of a coating film. <P>SOLUTION: In the spindle coating in which several objects to be coated are placed on rotary tables, revolved and coated simultaneously, the rotary tables are successively intermittently moved using rotary feeders arranged on the circumference, and coating is performed using the rotary tables at two places and rotating them in normal and reversal rotations. Loading and unloading of the objects are performed in other places. The rotary tables on which the objects are placed are successively sent to the normal rotation position and, after the coating, moved to the reversal rotation position, and the coating is completed by the reversal rotation. The coating by the successive normal rotation and by the reversal rotation are carried out in parallel. The apparatus is provided with a rotary device in which a feeder with the rotary tables installed in Y shaped three places is normally and reversely rotated in two coating positions, respectively. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

This is a technique for improving the productivity of rotating spindle coating, in which an object to be coated is placed on a rotating table on a circumference and revolved while rotating in the forward and reverse directions.

When painting a large amount of objects to be coated, automatic spindle coating is often used, where a rotating table is provided on the rotating spindle that can place multiple objects to be coated on the circumference, and the object is painted while revolving. Yes.
According to this method, spray guns corresponding to the painting location are arranged in several places or to be sprayed in the necessary painting area by a painting robot etc. on the object to be sent while revolving one after another, respectively A plurality of the plurality of objects to be coated can be coated at the same time by painting the portion where the spray gun is determined.

In the spindle coating method, since the object to be revolved is coated, there is a coating surface that faces the spray gun with respect to the rotation direction, and a coating surface that moves away from the spray gun, resulting in uneven coating. Many of the objects to be coated with these coatings are relatively small in recent years such as mobile phones, acoustic equipment, optical equipment, etc., and at the same time, a high-class feeling is required, and high quality paint is required together with expensive paint. Has been. Therefore, in spindle coating, it is also a necessary condition to perform forward rotation coating and reverse rotation coating together.

Under these conditions, spindle coating can be performed with high productivity by providing a forward-rotation coating area and a reverse-rotation coating area on the conveyor line, and completing the painting by passing through the respective coating areas. There is a way. (For example, see Patent Document 1)
However, if the production volume is not so large and a large-scale painting facility cannot be adopted, a spindle device equipped with a rotating table is installed at the painting position, painting is performed in the forward direction, and then rotated in the reverse direction and again. The method of painting is taken. Therefore, a loss time during which the painting operation cannot be performed while the rotation is changed results in a long painting cycle.

In addition, the painting process involves an unloading operation for placing on a turntable and an unloading operation for removing the object to be painted, but in spindle coating used to increase productivity, In all the conditions, it is required to reduce the loss time at all points and to be able to paint by a highly efficient method, and generally there is also a relationship between the front and rear processing steps, and each turntable on which a large number of objects to be coated are placed Incoming and unloading are often performed.

JP 2004-33887 A

In any case, it is necessary to reverse the direction of revolution of the object to be rotated in spindle coating, in which a large number of objects are revolved and simultaneously applied. It is necessary to increase productivity by shortening the coating time.
Also in spindle coating, there are many cases in which equipment to be coated placed at the attachment / detachment position is transported to the painting position by a conveyor and returned to the attachment / detachment position after painting, and the present invention is efficient under such conditions. The challenge is to improve the productivity by painting.

The present invention provides a spindle coating in which a large number of objects to be coated are placed on the circumference of the rotary table and revolved simultaneously to perform coating, and the rotary table is divided into equal angles on the rotary circumference of the rotary feeder. It is placed at three locations and intermittently moved, and two of them are set as painting positions and rotated in the forward and reverse directions to perform painting, and the other objects are loaded and unloaded. The rotary table with the object to be coated at the attachment / detachment position is sent sequentially and forward to the forward rotation position, and after painting, it is moved to the reverse rotation position to complete the reverse rotation, and this is repeated in sequence. And reverse painting at the same time.

In the apparatus for carrying out the method, a rotary table is arranged at three positions divided at equal angles on the rotation circumference of a rotary feeder that is intermittently driven, and a predetermined one of the three positions is determined by the rotational movement of the rotary feeder. A rotating device is provided in which the rotary table moved to two positions is rotated by forward rotation and reverse rotation, respectively.
The rotating device has a configuration in which the rotation driving means provided at a fixed position rotates by engaging with the rotating shaft of the rotating table that has been moved by the rotation of the rotating feeder, or the rotating device directly provided on each rotating table includes the rotating feeder. There are means controlled by a predetermined rotation according to the stop position.

In the present invention, as described above, a large number of objects to be coated placed on the rotary table on the rotary feeder are returned to the unloading position by the rotary feeder through the coating position in the forward rotation and the coating position in the reverse rotation. In the meantime, it is possible to complete the optimum coating for the spindle coating, and since the coating is continuously performed on the rotary tables that are sequentially placed, the next rotation is performed while the reverse rotation is being performed. Since the object to be coated on the table is coated in the forward rotation, it can be done in about half the time required so far, and productivity can be greatly improved.

In addition, after painting the object to be coated in the normal rotation as before, there is no need for waiting time for the spray gun, painting robot, etc. at the painting position until the rotation of the rotary table is reversed. It takes a limited amount of time. In addition, since the other rotary table can be unloaded and loaded during painting, the attachment and detachment time can be shortened compared to the case of reciprocating conveyance so far, and in this respect also productivity can be improved and painting can be achieved. Cost can be reduced.

It is a top view of the rotation feeder in the case of implementing this invention. It is a side view of the rotation feeder of FIG. It is explanatory drawing which looked at the spindle coating process on the time axis.

An example of an apparatus for carrying out the coating method of the present invention will be described with reference to FIGS. FIG. 1 is a plan view of a painting robot constituting a painting robot placed in a painting area where spindle painting is performed, a feeder that is a conveying device for an object to be painted, and a paint mist exhaust device, and FIG. 2 is a side view of the painting chamber. Yes.

The painting robot 1 is a device that can perform spraying while freely moving the spray gun 2 attached to the tip of the operating arm by a signal from a separately provided control device. Without being limited thereto, a simpler automatic coating apparatus can be used. In the case of the present embodiment, the painting robot can be controlled comprehensively by the control device, such as the conveyance control of the object to be coated and the spray control of the spray gun, and can be used for efficient operation as automatic painting. Has been.

Two painting robots 1 are installed, and a rotary feeder 3 is installed at the center thereof. The rotary feeder 3 that rotates and conveys the object to be coated 10 is provided with a rotary table 5 at a position equally divided on the same circumference at the tip of the arm 4 extending in three directions in the Y shape. The angle between each other is 120 degrees. The positions of the rotary table 5 are intermittently driven so that the position of the spray gun 2 is set to the position A and B where the spray gun 2 is coated and the position C where the object to be coated is attached and detached by the driving device 6 provided in the rotary feeder 3. Is done. At each coating position, a rotating device for driving the rotary table 5 is provided, and the rotary table is rotated forward at the first coating position A and reversely rotated at the second coating position B. Yes. Reference numeral 9 denotes a painting chamber.

The means for rotating the rotary table when it moves to the set coating position is provided with a separate rotating device at each coating position, and when each rotary table moves to the set position by the rotation of the rotary feeder 3. The rotation device may be configured to automatically transmit the rotation by engaging with the rotation device, for example, the rotation drive means installed at a fixed position is rotated by providing a rotation drum, while the rotation table is provided with a rotation shaft, A structure is adopted in which the rotating shaft is rotated by frictional transmission when it contacts the rotating drum. Several such means are known and are selected depending on the status of the installed device.

It is also possible to control the rotation at each coating position by program control of the rotating device. In this case, a rotating device is provided directly on the rotary table, and when the rotary table comes to the respective painting position or attachment / detachment position in conjunction with the operation of the rotary feeder, each rotation or stop is determined by the operation signal of the control device set in advance. It is configured to be driven and controlled.

On the other hand, at the attachment / detachment position, the rotary table is maintained in a stopped state for removing and attaching the object to be coated. Therefore, it is desirable to send it to the attachment / detachment position via some braking device while moving from the second painting position B. The attachment / detachment of the object to be coated is usually performed for each turntable although it depends on the condition of the object to be coated. In this case, although not limited to this, the spindle 7 and the rotary table 5 provided in the rotary feeder 3 are configured to be easily detachable by insertion or the like. In addition, by setting the rotation start position before reaching the coating position and setting it to the coating position in a stable rotation state, it is possible to paint immediately, eliminating loss time and stabilizing the coating quality. Can do.

The actual coating performed with these configurations will be described in detail below.
A turntable 5 on which an object to be coated 10 is placed at the attachment / detachment position C is mounted on a rotary spindle, and is driven by the rotary feeder 3 to be sent to the first painting position A. Here, the rotary table 5 rotates forward in the direction of the arrow, and the painting set by the spray gun 2 mounted on the painting robot 1 is applied. Next, the rotary feeder 3 is actuated again to move the rotary table at the first painting position to the second painting position. At the second painting position B, the rotary table 5 is rotated in the reversely rotated state and painting is performed. As a result, the entire surface to be coated is finished to have a uniform coating, moves to the original attachment / detachment position C, is unloaded, and is sent to the next process such as drying.

Since three rotary tables 5 are used in the present invention, a new object to be coated is placed on the next rotary table 5 while coating is performed at the first coating position, When coating is performed in the reverse rotation at the second coating position, the coating moves to the first coating position and is performed at the same time as the forward rotation, and the coating is sequentially performed as shown in FIG.

Up to now, it is a transport means that reciprocates between the painting position and the attachment / detachment position, and when painting was performed by rotating forward and backward at the painting position, it can be completed if 30 seconds are required for painting in one direction. It only takes 1 minute to paint the object to be coated on one rotary table.

In the present invention, as shown in FIG. 3, not only the painting time but also the unpainted object to be painted is unloaded from the rotary table waiting at the attachment / detachment position C during painting, and a new object is placed. This can save time for attachment and detachment. Further, when the rotation is changed at the same position in the past, it takes time to stop and reverse, and during this time, it becomes the waiting time of the painting robot (spray gun). However, in the present invention, this loss time can be eliminated.

As described above, since the forward rotation and the reverse rotation of the rotary table required for spindle coating are performed at the respective coating positions, the period of time during which the coating is interrupted is while the rotary spindle moves between the coating positions. Time can be kept to a minimum, and work efficiency can be increased and productivity can be improved.

With the Y-shaped rotary feeder, coating is performed at two locations. Simultaneously and symmetrically can be applied to the rotary table on which the workpiece is placed, so that the spray gun can be connected to one stay. By attaching them to the positions corresponding to the objects to be coated placed on the counter-rotating rotary tables on both sides of each of them, it is possible to configure them to be applied simultaneously by one painting robot or automatic painting machine by synchronous operation. Can do.

In this embodiment, the rotary feeder is Y-shaped with the arm extended in terms of ease of manufacture and cost, but this is not necessarily limited to this, and the rotary table equally divided on the rotary table is a circle. The same object can be achieved by providing the sensor on the circumference. Further, the same effect can be obtained by separately providing the landing position and the unloading position and providing the rotary table on the circumference by dividing into four equal parts.

DESCRIPTION OF SYMBOLS 1 Coating robot 2 Spray gun 3 Rotary feeder 4 Arm 5 Rotary table 6 Drive device 7 Spindle 10 Object to be coated

Claims (4)

In spindle coating, where a large number of objects to be coated are placed on the circumference of the rotary table and revolved simultaneously, the spindle coating is performed at the same angle on the circumference of the rotary feeder that transports the objects to be painted to the painting position. The rotary table is placed at three locations and moved intermittently, and coating is performed by rotating the rotary table in the forward and reverse directions at two locations out of the positions where the rotary table is stopped. The product is loaded and unloaded, and the turntable on which the object is placed is moved sequentially from the attachment / detachment position to the forward rotation position and the reverse rotation position, and the forward rotation and reverse rotation are sequentially applied. Spindle automatic painting method that performs simultaneously. 2. The coating method according to claim 1, wherein the spray gun is disposed at a position corresponding to each object to be coated, and the spray gun is provided at a common operating rod to perform coating at the forward rotation and reverse rotation positions at the same time. A rotary table is arranged at three positions divided at equal angles on the rotation circumference of the rotary feeder that is intermittently driven by the drive device, and the rotary feeder is moved to the predetermined two positions by the rotational movement of the rotary feeder. The rotating table that has been moved is provided with a rotating device that is rotated in the normal rotation and the reverse rotation, respectively. A spindle automatic coating device equipped with a mechanism that rotates when the shaft is engaged to rotate the rotary table. A rotary table is arranged at three positions divided at equal angles on the rotation circumference of the rotary feeder that is intermittently driven by the drive device, and the rotary feeder is moved to the predetermined two positions by the rotational movement of the rotary feeder. The rotating table that has moved is provided with a rotating device that is rotated in the normal rotation and the reverse rotation, respectively, and the rotating device is provided with a driving device that is directly connected to the respective rotating table, and rotates in synchronization with the stop position of the rotating feeder. Spindle automatic painting device driven by control means to control.

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